scholarly journals Linear cosmological constraints on two-body decaying dark matter scenarios and the S8 tension

2021 ◽  
Vol 104 (12) ◽  
Author(s):  
Guillermo F. Abellán ◽  
Riccardo Murgia ◽  
Vivian Poulin
Keyword(s):  
Dark Matter ◽  
Cosmological Constraints ◽  
Decaying Dark Matter

scholarly journals Cosmological constraints on late-Universe decaying dark matter as a solution to the H0 tension

2021 ◽  
Vol 103 (4) ◽  
Author(s):  
Steven J. Clark ◽  
Kyriakos Vattis ◽  
Savvas M. Koushiappas
Keyword(s):  
Dark Matter ◽  
Cosmological Constraints ◽  
Decaying Dark Matter

scholarly journals Cosmological constraints on decaying dark matter

2009 ◽  
Vol 2009 (06) ◽  
pp. 005-005 ◽  
Author(s):  
Santiago De Lope Amigo ◽  
William Man-Yin Cheung ◽  
Zhiqi Huang ◽  
Siew-Phang Ng
Keyword(s):  
Dark Matter ◽  
Cosmological Constraints ◽  
Decaying Dark Matter

scholarly journals Deep Search for Decaying Dark Matter with XMM-Newton Blank-Sky Observations

2021 ◽  
Vol 127 (5) ◽  
Author(s):  
Joshua W. Foster ◽  
Marius Kongsore ◽  
Christopher Dessert ◽  
Yujin Park ◽  
Nicholas L. Rodd ◽  
...  
Keyword(s):  
Dark Matter ◽  
Decaying Dark Matter

scholarly journals INTERACTION BETWEEN DARK ENERGY AND DARK MATTER: OBSERVATIONAL CONSTRAINTS FROM OHD, BAO, CMB AND SNe Ia

2013 ◽  
Vol 22 (14) ◽  
pp. 1350082 ◽  
Author(s):  
SHUO CAO ◽  
NAN LIANG
Keyword(s):  
Dark Matter ◽  
Dark Energy ◽  
Observational Constraints ◽  
Coincidence Problem ◽  
Cosmological Constraints ◽  
Coincidence Index ◽  
Acceleration Of The Universe ◽  
Interaction Term ◽  
Negative Coupling ◽  
The Universe

In order to test if there is energy transfer between dark energy (DE) and dark matter (DM), we investigate cosmological constraints on two forms of nontrivial interaction between the DM sector and the sector responsible for the acceleration of the universe, in light of the newly revised observations including OHD, CMB, BAO and SNe Ia. More precisely, we find the same tendencies for both phenomenological forms of the interaction term Q = 3γHρ, i.e. the parameter γ to be a small number, |γ| ≈ 10-2. However, concerning the sign of the interaction parameter, we observe that γ > 0 when the interaction between dark sectors is proportional to the energy density of dust matter, whereas the negative coupling (γ < 0) is preferred by observations when the interaction term is proportional to DE density. We further discuss two possible explanations to this incompatibility and apply a quantitative criteria to judge the severity of the coincidence problem. Results suggest that the γm IDE model with a positive coupling may alleviate the coincidence problem, since its coincidence index C is smaller than that for the γd IDE model, the interacting quintessence and phantom models by four orders of magnitude.

Gravitino dark matter and cosmological constraints

2009 ◽  
Author(s):  
Ki-Young Choi ◽  
Csaba Balazs ◽  
Fei Wang
Keyword(s):  
Dark Matter ◽  
Cosmological Constraints

Decaying Dark Matter and the Deficit of Dwarf Halos

2009 ◽  
Author(s):  
Majd Abdelqader ◽  
Fulvio Melia ◽  
Shaaban Khalil
Keyword(s):  
Dark Matter ◽  
Decaying Dark Matter
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